Philips NTX800 Service Manual page 38

CIRCUIT DIAGRAM - AMP BOARTD
osc 500k or 600k
inverted for 250k or 300k
500K-600K(1)
500K-600K(2)
U706
Y702
600KHZ
+
47K
74HCTO4
R7154
C735
220u/16V
Q702 럽 宮 포
BC847
R738 1M
R742 C737
R735
6.8K 102
1K
C739
33P
R741
10K
R739
Q701
47K
BC857 AM_HOP
[1]
C734
102
D45
Q12 Pllug and unplug AC cord for backup -5V
R116 SOD123
BT5401 C727
1K/1W SOD123
R96
100u/16V
Q14
D46
BT5401 22R/0.5w
104 -12V [1,2]
R113 C7284
C728 +
R117
12V 102
30k 1K5
Z44
Q11 D26
R118
2N5551 SOD123
10K
R112
1K/1W
Pllug and unplug AC cord for backup +5V
+75V Q13
[1,2]
BC847
R111
CN702
30k
R114 R97
DCOFFSET-CTL
1K5
DCOFFSET-CTL [1]
22R/0.5W
Z25
-12V
12V
AMP-ON
AMP-ON [1] D43
R115
SOD123
AM_HOP 10K
AM_HOP [1]
+12V
[1,2]
P11
+12V
GND
RIGHT
[2]
RIGHT
GND
LEFT
LEFT
[2]
+
J2 L711
+75V J1
100MHZ/80R
[1,2]
L712
100MHZ/80R
L713
100MHZ/80R
L714
100MHZ/80R
TO SMPS PB +
+
+ +
CN701
C701
+75V
1500U/100V
P1 G3
G2
P2
G1
P4
+ + +
-75V +
-58V
P22
[1,2]
-75V L717
100MHZ/80R
L718
100MHZ/80R
L719
100MHZ/80R
L720
-75V
100MHZ/80R
100u/16V 100u/16V 100u/16V
Q15
2N5551 C43 C44 C45
Z4
12V + + +
Q9
NC
SOD123 L716
R121
NC
FB600R/1A
D27
SOD123 L715
FB600R/1A
D28
R122
NC
SOD123
L723
D25
FB600R/1A
SOD123 D29
SOD123 L724
D44
SOD123 FB600R/1A
D30
7-8
OSC1
R417
C3427 47R
104
FB600
FB600 +12V
R731
L721
[1,2]
L722
220
250k-300k(1)
R418
HEF4013 47R
Z702
C730 C729
5V6
33P
102 104
HI_LIN
C7263
[1]
[2]
OSC2
C8929
250k-300k(2)
222
pins1 pins2 Working OSC
AM_HOP
H H L BC857 500K
C731
BC847 600K
222 L L H
-75V
R703
-VSS1
CJ7905
[1]
10R0.5w
R704
-VSS2
IC5
[1]
10R0.5w
100u/10V
R705
C706
-VSS3
[2]
10R0.5w
R706
+ -VSS4
[2]
10R0.5w
R707
+VAA1
SA1117-5V [1]
10R0.5w
R708 +VAA2
10R0.5w
IC4 [1]
R7155
+VAA3
+ 10R0.5w
[2]
R709
+VAA4
10R0.5w
[2]
C7239
100u/10V
P26
P27
P28
P37
P35
P36
C114
100u/16V
C7777 104
R7719 10R
+12V
[1,2] change to 470p R100 NC
R7720 100K
+VB1
[1] R7729 C7773
4K7 470P
C7772 1N5
LEFT_IN
[2]
HI_LIN
+VB2 C7771 10UF
[1]
[1]
change to 1k
HI_RIN
C7772
+VB3 273
[1,2] C7774
change to 1k
+VB4
[2]
[1]
C7770 10UF
HI_RIN
R7728
C7775 C7774
220P C92
4K7
470P 1N5
RIGHT_IN
+ 0R R95
[2]
change to 470p
R7723 R101
100K NC
104
-12V
[1,2] R7724 10R C7776
C115 100u/16V
2014-11-13 R7773,R7775 C7102,C292
+
10N 3N9
1kHz 롸 틉
2kHz 롸 틉 222
68OP
182
2.5kHz 롸 틉 47OP
H=work
-VB1
[1] L=power off
DCOFFSET-CTL Q705
-VB2
[1]
[1]
(TO MCU PWR_DET)
Q706
-VB3
[2]
+
C716
104
-VB4
100u/16V [2]
C68
improved PS auto protect(standby)
+
-VE1 0R R120
[1]
R7165
BC857
Q708
1K
-VE2
[1]
Q707
BC847
-VE3
[2]
-VE4
[2]
C94
R81
470R 220P
seclusion
AMP_CLK2
[1]
R415
C224
10K R163
68P
*120K1%
+5V
74HC2G04-SOT6
[1,2]
R414
adjustment input signal
U22 100R
1 1A 1Y 6
+VAA1
[1]
2 GND
VCC 5
3 2A 2Y 4
R420
C228 AMP_CLK1
10K
68P
R82
C95
470R
220P
330R 3K/1%
C227 4.7uF R412
R413
+5V
1 VAA
2 GND
3 IN-
C7242
C152 102
OSC-5v
222
4 COMP
222
BAS316
100R IC + 5V
C7244
5 CSD
10U/25v
[1,2] R178
D706 C221
- 5V
6 VSS
[1] -VSS1
8K2
7 VREF
R98
nx550 7k5
8 OCSET
B
2N5551 2N5551
Q25 Q26 R98/R99 OCP(Q2법 직 괏 빱 ）
OVP
LVP nx550 2k7
C
R411
R406 47K
DCP獨 된 5 0 A
SD1 [1]
10K
R503
47K
SD2 [1]
47V 47V
R504
Z3 47K
Z1
SD3 [1,2]
A
R505
47V
A=H,B=L,C=H
47K
SD4 [1,2]
A=L,B=H,C=L Z2
2092 pins5
H power on
L power off
AMP_CLK2
[1]
R23
*120K1%
adjustment input signal
+VAA2
[1]
330R 3K/1%
[1] C278 4.7uF
R79
R488
R148/R104 OCP(Q5법 직 괏 빱 ）
1 VAA
2 GND
3 IN-
C7
C10
102
222 OSC
4 COMP
222
BAS316
100R C8 IC Pin5 = 5V
SD2
5 CSD
[1]
10U/25v
R26
D6
C11
6 VSS
[1]
-VSS2
8K2
7 VREF
R12
8 OCSET
R98/R99 OCP(Q2법 직 괏 빱 ）
DCOFFSET
[1,2]
*47K
R719
+75V
[1,2]
2K2
R717
power on=5V
Q703
BC847
standy=2v8
power on=0.3v
AMP-ON
[1]
Z701
5V6 C719
1K R7151
104
Q704
AMP_ON=H
BC847
7-8
R156
1K1%0.25W
C764
150P250V
COG CAP
reduce noise cap
R153
68K
R152
75K
nx550 51k
R150
SOD123
10K
Q5
IRFB4227PBF
D704
G
R148
2K
D17 R102
4R7
nx550 3k9
SOD123
U19
R148/R104 OCP(Q5법 직 괏 빱 ） R104
8K2
16
CSH R103
nx550 6k2 10R
C98
15
VP
22U/25V
14
HO
big noise
13
VS
R746 R142/R147 increase for EMI,
12
VCC
but efficiency low， h eat to o in cr e ase
4R7
11
LO
NX550 10K
D18
R748
10
COM
SOD123 4R7
NC
9
TD
R90
G
R745 Q2
10R0.5W
R747
10R
IRFB4227PBF
-VE1
[1]
102
NC
C101 C99
To heatsink
R22
1K1%0.25W
C2
150P250V
COG CAP
reduce noise cap
R20 68K
R19 75K
NX550 47K
R18
SOD123
10K Q3
IRFB4227PBF
D2
G
R17
2K
D19 R14
4R7
U1 SOD123
R16
8K2
16
CSH
C12
R15
15
VP
10R
22U/25V
14
HO
big noise
13
VS
R9 R142/R147 increase for EMI,
12
VCC
but efficiency low， h eat to o in cr e ase
4R7
11
LO
D20 R7
NX550 10K
10
COM 4R7
SOD123
NC
9
TD
R91
G
Q1
R8
10R0.5W
R6
10R
IRFB4227PBF
-VE2
[1]
SD1
[1]
R721 4K7
standy=0V
SD2
[1]
R722 4K7
SD3
[1,2]
4K7
R723
SD4
[1,2]
R724 4K7
+VB1
[1]
L701 LT8 +
HI_L+
[2]
HI_L-
[2]
6TS:6TS
-
-VB1
[1]
+VB2
[1]
LT1
L702
-
3 4 HI_R-
[2]
1 2 HI_R+
[2]
+
6TS:6TS
-VB2
[1]